CN103605091B - Earth mat loop impedance simulation device - Google Patents

Earth mat loop impedance simulation device Download PDF

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CN103605091B
CN103605091B CN201310498481.9A CN201310498481A CN103605091B CN 103605091 B CN103605091 B CN 103605091B CN 201310498481 A CN201310498481 A CN 201310498481A CN 103605091 B CN103605091 B CN 103605091B
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relay
connect
impedance transformation
coil
impedance
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CN103605091A (en
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马俊超
马国栋
易焕
王娟
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HUAIAN SUDA ELECTRICAL Co Ltd
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Abstract

The invention discloses earth mat loop impedance simulation device, the electric loop of this analogue means comprises control circuit and load circuit, is interconnected to constitute according to electric circuit type by control circuit and load circuit and overprotection circuit.The present invention is as the calibrating of electric system, meteorological system, industrial enterprise and metrological service's earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester and calibration, improve calibrating and calibration accuracy, ensure electric equipment operation safety.

Description

Earth mat loop impedance simulation device
Technical field
The present invention relates to earth mat loop impedance simulation device, relate to calibrating and the calibration of earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester in electric system, meteorological system, large-scale industrial enterprise.
Background technology
Earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester in electric system, meteorological system, large-scale industrial enterprise, by periodic verification and calibration, can Timeliness coverage hidden danger, guarantee the safe operation of electrical network.At present, the method that the calibrating of earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester and calibration adopt measuring resistance to check, its shortcoming is cannot the virtual condition of analogue ground device, the antijamming capability of tested instrument and the size of rated power cannot be examined and determine, the requirement of big current calibrating cannot be realized.
Summary of the invention
The object of the invention is to: a kind of earth mat loop impedance simulation device is provided, as calibrating and the calibration of electric system, meteorological system, industrial enterprise and metrological service's earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester, improve calibrating and calibration accuracy, ensure electric equipment operation safety.
Technical solution of the present invention is: the electric loop of this analogue means comprises control circuit and load circuit, and its control circuit connects as follows by electronic devices and components: power switch ZK 11 end connect fuse B 12 ends, power switch ZK 12 ends connect 1 end of power supply relay JD, 2 ends of power supply relay JD connect zero line N, the two ends of pilot lamp XD connect 2 ends of 1 end of the coil of power supply relay JD and the coil of power supply relay JD respectively, and normal opened contact 3 end of power supply relay JD connects fuse B 12 ends, normal opened contact 4 end of power supply relay JD connects 2 ends of the coil of voltage relay YJ, and 4 ends of the coil of voltage relay YJ link zero line N; Current relay LJ 1normal opened contact 1 end connect 2 ends of the coil of voltage relay YJ, current relay LJ 1normal opened contact 3 end tie-time relay SJ 17 ends of coil, time relay sj 18 ends of coil connect zero line N;
Time relay sj 1normal opened contact 3 end connect current relay LJ 1normal opened contact 1 end, time relay sj 1normal opened contact 5 end connect 1 end of coil of intermediate relay ZJ, 2 ends of the coil of intermediate relay ZJ connect zero line N;
The 1 end tie-time relay SJ of temperature relay WK 1normal opened contact 3 end, 2 ends of temperature relay WK connect zero line N; Coil 1 end of time relay S connects 1 end of temperature relay WK, and 2 ends of time relay S coil connect 2 ends of temperature relay WK; Fan switch ZK 21 end of coil of normal opened contact 1 end tie-time relay S, 2 ends of 2 end connecting fan FS of the coil of time relay S, 2 ends of blower fan FS connect zero line N, pilot lamp XD 5two ends respectively 1 end of connecting fan FS and 2 ends of blower fan FS;
Intermediate relay ZJ normally closed contact 3 end connecting fan switch ZK 21 end of normal opened contact, normally closed 5 ends of intermediate relay ZJ connect current relay LJ 2normally closed contact 1 end, current relay LJ 2normally closed contact 3 end connect normally closed contact 4 end of temperature relay WK, normally closed contact 7 end of the normally closed contact 3 end tie-time relay S of temperature relay WK, normally closed contact 8 end of time relay S connects normally closed contact 1 end of voltage relay YJ, and normally closed contact 3 end of voltage relay YJ connects impedance change-over switch AN 11 end, impedance change-over switch AN 12 ends connect impedance transformation relay K M 4normally closed contact 3 end, impedance transformation relay K M 4normally closed contact 4 end connect impedance transformation relay K M 3normally closed contact 3 end, impedance transformation relay K M 3normally closed contact 4 end connect impedance transformation relay K M 2normally closed contact 7 end, impedance transformation relay K M 2normally closed contact 8 end connect impedance transformation relay K M 1coil 1 end, impedance transformation relay K M 12 ends connect zero line N, the two ends of pilot lamp XD1 connect impedance transformation relay K M respectively 11 end of coil and 2 ends of coil;
Impedance change-over switch AN 21 end connect impedance change-over switch AN 11 end, impedance change-over switch AN 22 ends connect impedance transformation relay K M 4normally closed contact 5 end, impedance transformation relay K M 4normally closed contact 6 end connect impedance transformation relay K M 3normally closed contact 5 end, impedance transformation relay K M 3normally closed contact 6 end connect impedance transformation relay K M 1normally closed contact 7 end, impedance transformation relay K M 1normally closed contact 8 end connect impedance transformation relay K M 21 end of coil, impedance transformation relay K M 22 ends of coil connect zero line N, the two ends of pilot lamp XD2 connect impedance transformation relay K M respectively 21 end of coil and 2 ends of coil;
Impedance change-over switch AN 31 end connect impedance change-over switch AN 21 end, impedance change-over switch AN 32 ends connect impedance transformation relay K M 4normally closed contact 7 end, impedance transformation relay K M 4normally closed contact 8 end connect impedance transformation relay K M 2normally closed contact 9 end, impedance transformation relay K M 2normally closed contact 10 end connect impedance transformation relay K M 1normally closed contact 9 end, impedance transformation relay K M 1normally closed contact 10 end connect impedance transformation relay K M 31 end of coil, impedance transformation relay K M 32 ends of coil connect zero line N, pilot lamp XD 3two ends connect impedance transformation relay K M respectively 31 end of coil and 2 ends of coil;
Impedance change-over switch AN 41 end connect impedance change-over switch AN 31 end, impedance change-over switch AN 42 ends connect impedance transformation relay K M 3normally closed contact 7 end, impedance transformation relay K M 3normally closed contact 8 end connect impedance transformation relay K M 2normally closed contact 11 end, impedance transformation relay K M 2normally closed contact 12 end connect impedance transformation relay K M 1normally closed contact 11 end, impedance transformation relay K M 1normally closed contact 12 end connect impedance transformation relay and meet KM 41 end of coil, impedance transformation relay K M 42 ends of coil connect zero line N, the two ends of pilot lamp XD4 connect impedance transformation relay K M respectively 41 end of coil and 2 ends of coil;
Its load circuit connects as follows by electronic devices and components: LH is punching current transformer, and 1 end of reometer A connects 1 end of punching current transformer LH secondary side, the 2 ends connection punching current transformer LH secondary sides of reometer A 2 ends; Current relay LJ 12 end splicing ears row L 1, current relay LJ 14 ends of coil connect current relay LJ 22 ends of coil, current relay LJ 24 ends of coil connect loaded impedance Z 11 end, loaded impedance Z 12 ends connect loaded impedance Z 21 end, loaded impedance Z 22 ends connect impedance transformation relay K M 1normally closed contact 5 end, impedance transformation relay K M 1normally closed contact 6 end connect zero line N 1;
Impedance transformation relay K M 3normal opened contact 9 end connect current relay LJ 24 ends of coil, impedance transformation relay K M 3normal opened contact 10 end connect impedance transformation relay K M 4normal opened contact 10 end, impedance transformation relay K M 49 ends connect impedance transformation relay K M 1normal opened contact 5 end, impedance transformation relay K M 1normal opened contact 6 end connect zero line N 1,;
Impedance transformation relay K M 1normal opened contact 5 end connect impedance transformation relay K M 2normal opened contact 5 end, impedance transformation relay K M 1normal opened contact 6 end connect impedance transformation relay K M 2normal opened contact 6 end;
Impedance transformation relay K M 2normal opened contact 13 end connect impedance transformation relay K M 3normal opened contact 9 end, impedance transformation relay K M 2normal opened contact 14 end connect impedance transformation relay K M 3normal opened contact 10 end, impedance transformation relay K M 214 ends connect loaded impedance Z again 31 end, loaded impedance Z 32 ends connect loaded impedance Z 41 end, loaded impedance Z 42 ends connect impedance transformation relay K M 1normal opened contact 6 end; Impedance transformation relay K M 113 ends connect impedance transformation relay K M 213 ends, impedance transformation relay K M 114 ends connect loaded impedance Z 32 ends.
The invention has the beneficial effects as follows: for electric system, meteorological system, at calibrating earthing device characterisitic parameter test macro in large-scale industrial enterprise, earth loop impedance test instrument, earth resistance tester, a kind of special earth mat loop impedance simulation device is provided, overcome electric system, meteorological system, earthing device characterisitic parameter test macro in large-scale industrial enterprise, earth loop impedance test instrument, what exist in earth resistance tester periodic verification and calibration process cannot analogue ground device actual condition, the interference free performance of tested instrument cannot be examined and determine, the shortcomings such as big current calibrating requirement cannot be reached, fill up the blank of this domain-specific earth mat loop impedance simulation device.
Accompanying drawing explanation
Fig. 1 is earth mat loop impedance simulation device circuit theory diagrams.
In figure: ZK 1power switch, ZK 2be fan switch, JD is power supply relay, and YJ is voltage relay, SJ 1be the overcurrent protection time relay, S is the Energy control time relay, and ZJ is auxiliary reclay, and WK is temperature relay, and FS is cooling fan, KM 1~ KM 4for impedance transformation relay, Z 1~ Z 4for loaded impedance, LJ 1and LJ 2current relay, B 1fuse, XD and XD 1~ XD 5be pilot lamp, LH is straight-through current transformer, and A is reometer, AN 1~ AN 4impedance change-over switch, N and N 1zero line, L and L 1be phase line, B1 is fuse.
Embodiment
As shown in Figure 1, the electric loop of this analogue means comprises control circuit and load circuit, and its control circuit connects as follows by electronic devices and components: power switch ZK 11 end connect fuse B 12 ends, power switch ZK 12 ends connect 1 end of power supply relay JD, 2 ends of power supply relay JD connect zero line N, and the two ends of pilot lamp XD connect 2 ends of 1 end of the coil of power supply relay JD and the coil of power supply relay JD respectively; Normal opened contact 3 end of power supply relay JD connects fuse B 12 ends, normal opened contact 4 end of power supply relay JD connects 2 ends of the coil of voltage relay YJ, and 4 ends of the coil of voltage relay YJ link zero line N; Current relay LJ 1normal opened contact 1 end connect 2 ends of the coil of voltage relay YJ, current relay LJ 1normal opened contact 3 end tie-time relay SJ 17 ends of coil, time relay sj 18 ends of coil connect zero line N;
Time relay sj 1normal opened contact 3 end connect current relay LJ 1normal opened contact 1 end, time relay sj 1normal opened contact 5 end connect 1 end of coil of intermediate relay ZJ, 2 ends of the coil of intermediate relay ZJ connect zero line N;
1 end tie-time relay SJ of temperature relay WK coil 1normal opened contact 3 end, 2 ends of temperature relay WK coil connect zero line N; Coil 1 end of time relay S connects 1 end of temperature relay WK coil, and 2 ends of time relay S coil connect 2 ends of temperature relay WK coil; Fan switch ZK 21 end of coil of normal opened contact 1 end tie-time relay S, fan switch ZK 2normal opened contact 2 end connect 1 end of cooling fan FS.2 ends of the coil of time relay S connect 2 ends of cooling fan FS, and 2 ends of cooling fan FS connect zero line N, pilot lamp XD 5two ends connect 1 end of cooling fan FS and 2 ends of cooling fan FS respectively;
Intermediate relay ZJ normally closed contact 3 end connecting fan switch ZK 21 end of normal opened contact, normally closed 5 ends of intermediate relay ZJ connect current relay LJ 2normally closed contact 1 end, current relay LJ 2normally closed contact 3 end connect normally closed contact 4 end of temperature relay WK, normally closed contact 7 end of the normally closed contact 3 end tie-time relay S of temperature relay WK, normally closed contact 8 end of time relay S connects normally closed contact 1 end of voltage relay YJ, and normally closed contact 3 end of voltage relay YJ connects impedance change-over switch AN 11 end, impedance change-over switch AN 12 ends connect impedance transformation relay K M 4normally closed contact 3 end, impedance transformation relay K M 4normally closed contact 4 end connect impedance transformation relay K M 3normally closed contact 3 end, impedance transformation relay K M 3normally closed contact 4 end connect impedance transformation relay K M 2normally closed contact 7 end, impedance transformation relay K M 2normally closed contact 8 end connect impedance transformation relay K M 1coil 1 end, impedance transformation relay K M 12 ends connect zero line N, the two ends of pilot lamp XD1 connect impedance transformation relay K M respectively 11 end of coil and 2 ends of coil;
Impedance change-over switch AN 21 end connect impedance change-over switch AN 11 end, impedance change-over switch AN 22 ends connect impedance transformation relay K M 4normally closed contact 5 end, impedance transformation relay K M 4normally closed contact 6 end connect impedance transformation relay K M 3normally closed contact 5 end, impedance transformation relay K M 3normally closed contact 6 end connect impedance transformation relay K M 1normally closed contact 7 end, impedance transformation relay K M 1normally closed contact 8 end connect impedance transformation relay K M 21 end of coil, impedance transformation relay K M 22 ends of coil connect zero line N, the two ends of pilot lamp XD2 connect impedance transformation relay K M respectively 21 end of coil and 2 ends of coil;
Impedance change-over switch AN 31 end connect impedance change-over switch AN 21 end, impedance change-over switch AN 32 ends connect impedance transformation relay K M 4normally closed contact 7 end, impedance transformation relay K M 4normally closed contact 8 end connect impedance transformation relay K M 2normally closed contact 9 end, impedance transformation relay K M 2normally closed contact 10 end connect impedance transformation relay K M 1normally closed contact 9 end, impedance transformation relay K M 1normally closed contact 10 end connect impedance transformation relay K M 31 end of coil, impedance transformation relay K M 32 ends of coil connect zero line N, pilot lamp XD 3two ends connect impedance transformation relay K M respectively 31 end of coil and 2 ends of coil;
Impedance change-over switch AN 41 end connect impedance change-over switch AN 31 end, impedance change-over switch AN 42 ends connect impedance transformation relay K M 3normally closed contact 7 end, impedance transformation relay K M 3normally closed contact 8 end connect impedance transformation relay K M 2normally closed contact 11 end, impedance transformation relay K M 2normally closed contact 12 end connect impedance transformation relay K M 1normally closed contact 11 end, impedance transformation relay K M 1normally closed contact 12 end connect impedance transformation relay and meet KM 41 end of coil, impedance transformation relay K M 42 ends of coil connect zero line N, the two ends of pilot lamp XD4 connect impedance transformation relay K M respectively 41 end of coil and 2 ends of coil;
Its load circuit connects as follows by electronic devices and components: LH is straight-through current transformer, phase line L 1circular hole in the middle of straight-through current transformer LH passes, and plays LH winding; 1 end of straight-through current transformer LH Secondary Winding output terminal connects 1 end of reometer A, and 2 ends of straight-through current transformer LH Secondary Winding output terminal connect 2 ends of reometer A; Phase line L 1circular hole in the middle of straight-through current transformer LH is through rear connection current relay LJ 12 ends of coil, current relay LJ 14 ends of coil connect current relay LJ 22 ends of coil, current relay LJ 24 ends of coil connect loaded impedance Z 11 end, loaded impedance Z 12 ends connect loaded impedance Z 21 end, loaded impedance Z 22 ends connect impedance transformation relay K M 1normal opened contact 5 end, impedance transformation relay K M 1normal opened contact 6 end connect zero line N 1;
Impedance transformation relay K M 3normal opened contact 9 end connect current relay LJ 24 ends of coil, impedance transformation relay K M 3normal opened contact 10 end connect impedance transformation relay K M 4normal opened contact 10 end, impedance transformation relay K M 49 ends connect impedance transformation relay K M 1normal opened contact 5 end ;
Impedance transformation relay K M 1normal opened contact 5 end connect impedance transformation relay K M 2normal opened contact 5 end, impedance transformation relay K M 1normal opened contact 6 end connect impedance transformation relay K M 2normal opened contact 6 end;
Impedance transformation relay K M 2normal opened contact 13 end connect impedance transformation relay K M 3normal opened contact 9 end, impedance transformation relay K M 2normal opened contact 14 end connect impedance transformation relay K M 3normal opened contact 10 end, impedance transformation relay K M 214 ends connect loaded impedance Z again 31 end, loaded impedance Z 32 ends connect loaded impedance Z 41 end, loaded impedance Z 42 ends connect impedance transformation relay K M 1normal opened contact 6 end; Impedance transformation relay K M 1normal opened contact 13 end connect impedance transformation relay K M 2normal opened contact 13 end, impedance transformation relay K M 114 ends connect loaded impedance Z 32 ends, loaded impedance Z 32 ends connect impedance transformation relay K M again 1normal opened contact 4 end, impedance transformation relay K M 1normal opened contact 3 end connect loaded impedance Z 12 ends.
The principle of work of above-mentioned analogue means is as follows: during system starts, and must manually close fan switch, starts cooling blower FS, cools system; Overvoltage protection is made up of over voltage relay YJ, and overvoltage value is adjusted arbitrarily within the scope of 242V ~ 264V, when loop voltage exceedes setting valve, and overvoltage protection YJ action, YJ normally closed contact disconnects, and cuts off performance loop; Short-circuit protection is by LJ 2form, when load circuit is short-circuited, LJ 2action, LJ 2normally closed contact disconnects, and cuts off performance loop, LJ 2the setting range of short-circuit protection is adjusted arbitrarily in 50A ~ 100A; Overcurrent protection is by LJ 1and time relay sj 1form, when load circuit excess current, LJ 1action, LJ 1normal opened contact close, start-up time relay SJ 1, SJ 1normal opened contact is closed after time delay, starts intermediate relay ZJ, and after ZJ action, ZJ normally closed contact disconnects, and cut off performance loop, the definite value of overcurrent protection is adjusted arbitrarily in 5A ~ 30A, SJ 1time setting scope is 1 second ~ 10 seconds, ZJ model DZ15; Overheating protection is made up of WK, and when system occurs overheated, WK normally closed contact disconnects, and cut off performance loop, the definite value of overheating protection is adjusted arbitrarily within the scope of 90 DEG C ~ 120 DEG C; Timing control loop is made up of time relay S, and the time of S adjusted arbitrarily in 60 minutes at 1 minute, when the system is operating during overtime setting valve, and S action, S normally closed contact disconnects, and cuts off performance loop; According to the needs of testing, select the size of loaded impedance, pass through AN 1~ AN 4the switching of button, realizes the switching of impedance; In impedance load loop, Z 1=Z 2=Z 3=Z 4=30, impedance switch operating principle is as follows: close AN 1switch, KM 1action, Z 2and Z 4parallel connection, its equiva lent impedance is 15; Close AN 2switch, KM 2action, its equiva lent impedance is (Z 1+ Z 2) // (Z 3+ Z 4)=(30+30) // (30+30)=30; Close AN 3switch, KM 3action, its equiva lent impedance is (Z 3+ Z 4)=30+30=60; Close AN 4switch, KM 4action, its equiva lent impedance is (Z 1+ Z 2+ Z 3+ Z 4)=30+30+30+30=120.

Claims (1)

1. earth mat loop impedance simulation device, is characterized in that: the electric loop of this analogue means comprises control circuit and load circuit, and its control circuit connects as follows by electronic devices and components: power switch ZK 11 end connect fuse B 12 ends, power switch ZK 12 ends connect 1 end of power supply relay JD, 2 ends of power supply relay JD connect zero line N, the two ends of pilot lamp XD connect 2 ends of 1 end of the coil of power supply relay JD and the coil of power supply relay JD respectively, and normal opened contact 3 end of power supply relay JD connects fuse B 12 ends, normal opened contact 4 end of power supply relay JD connects 2 ends of the coil of voltage relay YJ, and 4 ends of the coil of voltage relay YJ link zero line N; Current relay LJ 1normal opened contact 1 end connect 2 ends of the coil of voltage relay YJ, current relay LJ 1normal opened contact 3 end tie-time relay SJ 17 ends of coil, time relay sj 18 ends of coil connect zero line N;
Time relay sj 1normal opened contact 3 end connect current relay LJ 1normal opened contact 1 end, time relay sj 1normal opened contact 5 end connect 1 end of coil of intermediate relay ZJ, 2 ends of the coil of intermediate relay ZJ connect zero line N;
1 end tie-time relay SJ of temperature relay WK coil 1normal opened contact 3 end, 2 ends of temperature relay WK coil connect zero line N; Coil 1 end of time relay S connects 1 end of temperature relay WK coil, and 2 ends of time relay S coil connect 2 ends of temperature relay WK coil; Fan switch ZK 21 end of coil of normal opened contact 1 end tie-time relay S, fan switch ZK 2normal opened contact 2 end connect 1 end of cooling fan FS; 2 ends of the coil of time relay S connect 2 ends of cooling fan, and 2 ends of cooling fan FS connect zero line N, pilot lamp XD 5two ends connect 1 end of cooling fan FS and 2 ends of cooling fan FS respectively;
Intermediate relay ZJ normally closed contact 3 end connecting fan switch ZK 21 end of normal opened contact, normally closed 5 ends of intermediate relay ZJ connect current relay LJ 2normally closed contact 1 end, current relay LJ 2normally closed contact 3 end connect normally closed contact 4 end of temperature relay WK, normally closed contact 7 end of the normally closed contact 3 end tie-time relay S of temperature relay WK, normally closed contact 8 end of time relay S connects normally closed contact 1 end of voltage relay YJ, and normally closed contact 3 end of voltage relay YJ connects impedance change-over switch AN 11 end, impedance change-over switch AN 12 ends connect impedance transformation relay K M 4normally closed contact 3 end, impedance transformation relay K M 4normally closed contact 4 end connect impedance transformation relay K M 3normally closed contact 3 end, impedance transformation relay K M 3normally closed contact 4 end connect impedance transformation relay K M 2normally closed contact 7 end, impedance transformation relay K M 2normally closed contact 8 end connect impedance transformation relay K M 1coil 1 end, impedance transformation relay K M 12 ends connect zero line N, the two ends of pilot lamp XD1 connect impedance transformation relay K M respectively 11 end of coil and 2 ends of coil;
Impedance change-over switch AN 21 end connect impedance change-over switch AN 11 end, impedance change-over switch AN 22 ends connect impedance transformation relay K M 4normally closed contact 5 end, impedance transformation relay K M 4normally closed contact 6 end connect impedance transformation relay K M 3normally closed contact 5 end, impedance transformation relay K M 3normally closed contact 6 end connect impedance transformation relay K M 1normally closed contact 7 end, impedance transformation relay K M 1normally closed contact 8 end connect impedance transformation relay K M 21 end of coil, impedance transformation relay K M 22 ends of coil connect zero line N, the two ends of pilot lamp XD2 connect impedance transformation relay K M respectively 21 end of coil and 2 ends of coil;
Impedance change-over switch AN 31 end connect impedance change-over switch AN 21 end, impedance change-over switch AN 32 ends connect impedance transformation relay K M 4normally closed contact 7 end, impedance transformation relay K M 4normally closed contact 8 end connect impedance transformation relay K M 2normally closed contact 9 end, impedance transformation relay K M 2normally closed contact 10 end connect impedance transformation relay K M 1normally closed contact 9 end, impedance transformation relay K M 1normally closed contact 10 end connect impedance transformation relay K M 31 end of coil, impedance transformation relay K M 32 ends of coil connect zero line N, pilot lamp XD 3two ends connect impedance transformation relay K M respectively 31 end of coil and 2 ends of coil;
Impedance change-over switch AN 41 end connect impedance change-over switch AN 31 end, impedance change-over switch AN 42 ends connect impedance transformation relay K M 3normally closed contact 7 end, impedance transformation relay K M 3normally closed contact 8 end connect impedance transformation relay K M 2normally closed contact 11 end, impedance transformation relay K M 2normally closed contact 12 end connect impedance transformation relay K M 1normally closed contact 11 end, impedance transformation relay K M 1normally closed contact 12 end connect impedance transformation relay and meet KM 41 end of coil, impedance transformation relay K M 42 ends of coil connect zero line N, the two ends of pilot lamp XD4 connect impedance transformation relay K M respectively 41 end of coil and 2 ends of coil;
Its load circuit connects as follows by electronic devices and components: LH is straight-through current transformer, phase line L 1circular hole in the middle of straight-through current transformer LH passes, and plays straight-through current transformer LH winding; 1 end of straight-through current transformer LH Secondary Winding output terminal connects 1 end of reometer A, and 2 ends of straight-through current transformer LH Secondary Winding output terminal connect 2 ends of reometer A; Phase line L 1circular hole in the middle of straight-through current transformer LH is through rear connection current relay LJ 12 ends of coil, current relay LJ 14 ends of coil connect current relay LJ 22 ends of coil, current relay LJ 24 ends of coil connect loaded impedance Z 11 end, loaded impedance Z 12 ends connect loaded impedance Z 21 end, loaded impedance Z 22 ends connect impedance transformation relay K M 1normal opened contact 5 end, impedance transformation relay K M 1normal opened contact 6 end connect zero line N 1;
Impedance transformation relay K M 3normal opened contact 9 end connect current relay LJ 24 ends of coil, impedance transformation relay K M 3normal opened contact 10 end connect impedance transformation relay K M 4normal opened contact 10 end, impedance transformation relay K M 49 ends connect impedance transformation relay K M 1normal opened contact 5 end;
Impedance transformation relay K M 1normal opened contact 5 end connect impedance transformation relay K M 2normal opened contact 5 end, impedance transformation relay K M 1normal opened contact 6 end connect impedance transformation relay K M 2normal opened contact 6 end;
Impedance transformation relay K M 2normal opened contact 13 end connect impedance transformation relay K M 3normal opened contact 9 end, impedance transformation relay K M 2normal opened contact 14 end connect impedance transformation relay K M 3normal opened contact 10 end, impedance transformation relay K M 214 ends connect loaded impedance Z again 31 end, loaded impedance Z 32 ends connect loaded impedance Z 41 end, loaded impedance Z 42 ends connect impedance transformation relay K M 1normal opened contact 6 end; Impedance transformation relay K M 1normal opened contact 13 end connect impedance transformation relay K M 2normal opened contact 13 end, impedance transformation relay K M 1normal opened contact 14 end connect loaded impedance Z 32 ends, loaded impedance Z 32 ends connect impedance transformation relay K M again 1normal opened contact 4 end, impedance transformation relay K M 1normal opened contact 3 end connect loaded impedance Z 12 ends.
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CN106645860B (en) * 2017-01-11 2019-04-02 国家电网公司 Substation grounding equipment energy characteristic parameter detecting check system
CN107831369B (en) * 2017-12-19 2020-07-03 成都信息工程大学 Grounding resistance monitor with self-checking and correcting functions

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